edu.umich.eecs.tac.props
Class KeyIterator<T>

java.lang.Object
  edu.umich.eecs.tac.props.KeyIterator<T>

Type Parameters:

T - the key class

All Implemented Interfaces:

java.util.Iterator<T>

public class KeyIterator<T>
extends java.lang.Object
implements java.util.Iterator<T>

Key iterator provides an iteration method that wraps a keyed entry iterator and returns the keys of those entries.

Author:

Patrick Jordan

Constructor Summary

KeyIterator(java.util.Iterator<? extends KeyedEntry<? extends T>> delegateIterator)
Create a new key iterator that delegates to the supplied iterator.

Method Summary

boolean	hasNext() Returns whether another key is available.
T	next() Returns tne next key.
void	remove() Throws an UnsupportedOperationException if called.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeyIterator

public KeyIterator(java.util.Iterator<? extends KeyedEntry<? extends T>> delegateIterator)

Create a new key iterator that delegates to the supplied iterator.

Parameters:

delegateIterator - a new key iterator that delegates to the supplied iterator.

Method Detail

hasNext

public final boolean hasNext()

Returns whether another key is available. This will return true if the delegated iterator has another entry.

Specified by:

hasNext in interface java.util.Iterator<T>

Returns:

whether another key is available.

next

public final T next()

Returns tne next key.

Specified by:

next in interface java.util.Iterator<T>

Returns:

tne next key.

remove

public final void remove()
                  throws java.lang.UnsupportedOperationException

Throws an UnsupportedOperationException if called.

Specified by:

remove in interface java.util.Iterator<T>

Throws:

java.lang.UnsupportedOperationException - if the method is invoked.